河か道どう

noun

river channel; floodway

Refers to the physical channel or course of a river, often in engineering or geographical contexts.

• この地ち域いきの河か道どうは大おお雨あめで氾はん濫らんしやすい。

  The river channel in this area is prone to flooding during heavy rain.

• 河か道どうの改かい修しゅう工こう事じが来らい月げつから始はじまる。

  River channel improvement work will start next month.